Lynn,
I get the feeling that you would rather not be so open about your cancer so I didn't really feel that I would be much help with this question. I am like Connie, I don't mind people knowing, family or strangers. But, I would rather that people not define me by cancer, so if they ask the questions, I answer politely and then keep on moving.
Connie is right, people have a tendency to be morbid and to sometimes get into your business, but I found that most initial concern from friends, church members and co-workers (oh, an lots of family from all over the country) was genuine enough.
My experience on the whole, was that it did me good to talk about it to people. There were some who helped relieve my mind, and some who did not help so much.
Anyway, we are all different in how much of this experience that we want to share with others.
Best regards,
Rosemary